strengthen

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

transitive v. To make strong or increase the strength of.

intransitive v. To become strong or stronger.

from Wiktionary, Creative Commons Attribution/Share-Alike License

v. To make strong or stronger; to add strength to; to increase the strength of; to fortify; to reinforce.

v. To animate; to give moral strength to; to encourage; to fix in resolution; to hearten.

v. To augment; to improve; to intensify.

v. To grow strong or stronger.

from the GNU version of the Collaborative International Dictionary of English

intransitive v. To grow strong or stronger.

transitive v. To make strong or stronger; to add strength to.

transitive v. To animate; to encourage; to fix in resolution.

from The Century Dictionary and Cyclopedia

To make strong or stronger; add strength to, either physical, legal, or moral; confirm; establish: as, to strengthen a limb; to strengthen an obligation; to strengthen a claim; to strengthen authority.

Examples

Mr. Liveris said the new terms strengthen his company's financial position compared with late last year, when the collapse of a joint venture with Kuwait left Dow without $9 billion it had planned to use to help pay for Rohm & Haas.